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Water, risks, environment

Water and water prices, floods and drought, regulated sites, soils, land take and EV charging, town by town.

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Water, risks and environment in Val-d'Oise

Water resources and water services, floods and drought, regulated industrial sites and contaminated land, land take (net zero land take) and EV charging: the public data an industrial or office project needs, town by town, with source and date.

Key figures

Each figure is read from its source or calculated here from it (sum or median); the reference date is shown under the value.

  • 888natural disaster recognitions for “flooding and mudflows” since 1982 (one per town and per order)Géorisques, Sept. 10, 2026
  • 257natural disaster recognitions for “drought” (clay shrink-swell), one per town and per orderGéorisques, Sept. 10, 2026
  • 38towns covered by a flood risk prevention planGéorisques · calculated
  • 347regulated industrial sites in operation (permit or registration)Géorisques, Oct. 3, 2026
  • 23Seveso sites (upper and lower tier)Géorisques
  • 128soil information sectors (known contamination)Géorisques
  • 1,117hectares of natural, agricultural and forest land taken from 2011 to 2021 (net-zero baseline period)Cerema · calculated
  • 286hectares taken from 2021 to 2025Cerema · calculated
  • 1,776publicly accessible EV charging pointsdata.gouv.fr, Oct. 3, 2026
  • 87,023,348m³ abstracted for drinking water in 2024Hub'eau · calculated
  • 3.04€ per m³ incl. VAT: median drinking-water price for 120 m³ (services based in Val-d'Oise)SISPEA 2024 · calculated

Map by town

Choose the indicator: each disc is a town, placed at its centre; its colour follows the legend. The table below gives the same values.

Indicator shown
  • 10 or more
  • 5 to 9
  • 1 to 4
  • none

Base map: IGN. Town positions: French administrative boundaries API. Values: see the table and sources.

Water: resources and services

Volumes abstracted from the environment by the département's water works and declared to the water agencies (national abstraction database, via Hub'eau), by use, for 2024.

  • Drinking water87,023,348 m³ · 97.6 % · 73 works
  • Industry and business1,490,602 m³ · 1.7 % · 43 works
  • Irrigation615,419 m³ · 0.7 % · 20 works

Public drinking-water and sewerage services

Val-d'Oise has 52 drinking-water services and 97 sewerage services whose authority is based in the département (SISPEA observatory, 2024 financial year). Price incl. VAT per m³ for a reference consumption of 120 m³: drinking water from €2.16 to €4.30 (median €3.04, 28 services publishing their price); sewerage median €1.90 (50 services).

Some towns are supplied by the Île-de-France water syndicate (SEDIF), based in Paris: it is listed first in the table.

Values reported by the authorities; some are published before being checked by State services. The observatory file does not list the towns of each service.

Show the table (54)
Public drinking-water and sewerage services
Organising authorityManagementOperatorPopulation servedPrice incl. VAT / m³ (120 m³)
Syndicat des Eaux D'Île-de-France (SEDIF)Delegated3,763,8532.18 €
Syndicat des Eaux D'Île-de-France (SEDIF)DelegatedSUEZ9362.18 €
CACP (COMMUNAUTÉ D'AGGLOMÉRATION DE CERGY-PONTOISE)Delegated216,3202.52 €
SI D'EXPLOITATION DES CHAMPS CAPTANTS D'ASNIERES SUR OISE (SIECCAO2020)Delegated31,5243.07 €
SMAEP DE LA REGION DAMONADelegatedCEG30,8343.54 €
SI DE L'EAU ET DU GAZ PERSAN BEAUMONT BERNESDelegated26,4872.64 €
SIAEP de la Région de L'ISLE ADAMDelegatedSUEZ22,8333.31 €
SIAEP DE LA REGION DE MONTSOULTDelegatedVEOLIA20,9763.20 €
SIAEP DE BELLEFONTAINEDelegated16,5142.74 €
GonesseDelegated13,038
SMAEP DE LA REGION DAMONADelegatedVEOLIA12,1633.02 €
SMAEP DE LA REGION DAMONADelegatedCEG11,6403.50 €
SI DES EAUX DE LA VIOSNE, DE L'AUBETTE ET DE LA MONTCIENT (SIEVAM)Public operation9,9592.71 €
SI DES EAUX du VAL de VIOSNEDelegated9,8362.90 €
SMAEP DE LA REGION DAMONADelegatedVEOLIA9,6333.96 €
DomontDelegated8,122
ArnouvilleDelegated7,329
SIE DE MOURS-NOINTEL-PRESLESDelegated6,5774.05 €
SIAEP VEXIN OUESTDelegatedVEOLIA5,081
Bruyères-sur-Oise4,392
SI ET INTERDEPARTEMENTAL DES EAUX DE BRAY ET LUDelegatedVEOLIA4,2414.30 €
SIAEP VEXIN OUESTDelegated3,5373.87 €
SIE D'ENNERY-LIVILLIERS-HEROUVILLEDelegated3,3852.89 €
SMAEP DE LA REGION DAMONADelegated2,7632.48 €
ViarmesDelegated2,725
SMAEP DE LA REGION DAMONADelegatedCEG2,3513.33 €
SMAEP DE LA REGION DAMONADelegated2,3513.33 €
Boissy-l'AillerieDelegated2,054
SI DES EAUX DE LA SOURCE SAINT-ROMAINPublic operation2,040
Nesles-la-ValléeDelegated1,8292.54 €
SI DE LA SOURCE de BERVAL1,671
SIAEP DE L' EPINE DU BUCDelegatedVEOLIA1,6582.38 €
SIAEP D'ARRONVILLE-BERVILLEDelegatedVEOLIA1,0032.39 €
Saint-Clair-sur-EpteDelegatedSUEZ9963.36 €
SI DES EAUX DE LA VIOSNE, DE L'AUBETTE ET DE LA MONTCIENT (SIEVAM)DelegatedVEOLIA9182.71 €
VétheuilDelegated8953.87 €
SIE DE VILLERS EN ARTHIES-CHAUSSY-CHERENCEPublic operation8283.21 €
Bonneuil-en-FranceDelegated584
Génicourt522
La Roche-GuyonPublic operation481
Montreuil-sur-EptePublic operation398
Ambleville396
Vienne-en-ArthiesPublic operation3742.16 €
NucourtPublic operation362
BuhyPublic operation325
Courcelles-sur-ViosneDelegated3042.80 €
Haute-IslePublic operation296
BrignancourtPublic operation226
SIAEP VEXIN OUESTPublic operation208
Montgeroult170
SIAEP VEXIN OUESTPublic operation109
TheuvillePublic operation26
SIAEP VEXIN OUESTPublic operation0
SIAEP VEXIN OUESTPublic operation0

Floods, drought and other natural hazards

Natural disaster orders published in the Official Journal since 1982 and natural hazard prevention plans are recorded by the State in the GASPAR database, published by Géorisques. An order recognises a past event; a prevention plan sets building rules in exposed areas.

There are 888 “flooding and mudflow” recognitions and 257 “drought” recognitions (one per town and per order); 69 towns have had at least one “drought” order, a sign of clay soil prone to shrink-swell. Latest order published: Sept. 10, 2026.

Flood risk prevention plans

38 towns are covered by at least one flood risk prevention plan:

  • PPRI Aubette de Magny et ruissellement
  • PPRI Epte
  • PPRI Presles
  • PPRI Sausseron
  • PPRI Seine Amont
  • PPRI Seine Aval
  • PPRI Seine Centre
  • PPRI Vallée de l'Oise

Radon potential (French radiation protection institute, via Géorisques): 183 towns in category 1 (the lowest), 0 in category 2, 0 in category 3.

For a specific address, the statutory risk statement (ERRIAL) can be produced free of charge on Géorisques. Géorisques: risk statement for an address

Regulated industrial sites and soils

1,363 installations classified for environmental protection are monitored in the département by the inspectorate; 347 are operating under a permit (151 under authorisation, 196 under registration).

Seveso sites

8 upper-tier and 15 lower-tier Seveso sites. Around an upper-tier site, a technological risk prevention plan may restrict development.

Seveso sites
SiteTownStatusState
EXOLUM AVIATION FRANCEChennevières-lès-LouvresSeveso seuil hautEn exploitation avec titre
SMCA Manutention Carburant AviationChennevières-lès-LouvresSeveso seuil hautEn exploitation avec titre
SMCA Manutention Carburant AviationChennevières-lès-LouvresSeveso seuil hautEn exploitation avec titre
StorengySaint-Clair-sur-EpteSeveso seuil hautEn exploitation avec titre
StorengySaint-Clair-sur-EpteSeveso seuil hautEn exploitation avec titre
AMPERE INDUSTRIESaint-Ouen-l'AumôneSeveso seuil hautEn exploitation avec titre
AMPERE INDUSTRIESaint-Ouen-l'AumôneSeveso seuil hautEn exploitation avec titre
NCS PYROTECHNIESurvilliersSeveso seuil hautEn exploitation avec titre
SILARBeauchampSeveso seuil basEn exploitation avec titre
SILARBeauchampSeveso seuil basEn exploitation avec titre
PROTEC INDUSTRIEBezonsSeveso seuil basEn exploitation avec titre
PROTEC INDUSTRIEBezonsSeveso seuil basEn exploitation avec titre
LOGIGAZ NORD SASPierrelayeSeveso seuil basEn exploitation avec titre
LOGIGAZ NORD SASPierrelayeSeveso seuil basEn exploitation avec titre
PROTEC DECORS SASSaint-Brice-sous-ForêtSeveso seuil basEn exploitation avec titre
PROTEC DECORS SASSaint-Brice-sous-ForêtSeveso seuil basEn exploitation avec titre
SIKA AUTOMOTIVE FRANCE SASSaint-Ouen-l'AumoneSeveso seuil basEn exploitation avec titre
AIR LIQUIDE FRANCE INDUSTRIESaint-Ouen-l'AumôneSeveso seuil basEn exploitation avec titre
BOREAL INDUSTRIAL FRANCE PROPCO 1 SCISaint-Ouen-l'AumôneSeveso seuil basEn exploitation avec titre
SOL FRANCESaint-Ouen-l'AumôneSeveso seuil basEn exploitation avec titre
SOL FRANCESaint-Ouen-l'AumôneSeveso seuil basEn exploitation avec titre
TAKASAGO E.P.L.Saint-Ouen-l'AumôneSeveso seuil basEn exploitation avec titre
TAKASAGO E.P.L.Saint-Ouen-l'AumôneSeveso seuil basEn exploitation avec titre

128 soil information sectors, where the State knows of contamination, require a soil study before a building permit; 4,009 former industrial and service sites are listed (a historical inventory, which does not mean the soil is contaminated).

Land sobriety: land take (net zero land take)

The Climate and Resilience Act of 22 August 2021 sets a target of net zero land take by 2050; land taken from 2011 to 2021 is the baseline. Cerema measurement from land files: 1,117.1 ha taken in the département from 2011 to 2021, 286.1 ha from 2021 to 2025, of which 141.6 ha for economic activity.

The table by town gives both periods. Land that is already developed (brownfields, existing business parks) does not count as new land take.

Low-carbon mobility: EV charging

1,776 publicly accessible charging points in 525 stations across 119 towns, according to the consolidated national database (updated Oct. 3, 2026); 657 points deliver 50 kW or more.

Stations, transport lines and major projects are in the “Transport” section of the Access, digital, energy page.

Table by town

One row per town. An empty cell means the source publishes no value for that town.

183 / 183 Download the table (CSV)
Table by town
TownFlood ordersDrought orders Flood planRadon (1 to 3)Regulated sites SevesoSoil sectorsLand taken 2011-2021 (ha) Land taken since 2021 (ha)Charging points
Ableiges 20 1 00 04.6 0.24
Aincourt 10 1 00 00.3 0.00
Ambleville 20 1 00 02.1 0.20
Amenucourt 30 PPRI Epte1 00 00.0 0.02
Andilly 63 1 00 02.8 3.12
Argenteuil 225 PPRI Seine Aval1 210 286.3 1.041
Arnouville 80 1 00 10.7 0.04
Arronville 10 1 10 05.7 0.50
Arthies 20 1 00 06.8 0.00
Asnières-sur-Oise 90 PPRI Vallée de l'Oise1 00 12.6 2.94
Attainville 40 1 40 012.4 0.00
Auvers-sur-Oise 130 PPRI Vallée de l'Oise1 00 020.4 0.34
Avernes 30 1 00 10.3 0.22
Baillet-en-France 34 1 40 05.5 0.32
Banthelu 10 1 00 00.0 0.00
Beauchamp 80 1 42 40.9 3.912
Beaumont-sur-Oise 113 PPRI Vallée de l'Oise1 30 00.8 1.27
Bellefontaine 40 1 00 03.7 0.10
Belloy-en-France 41 1 20 08.2 3.74
Bernes-sur-Oise 70 PPRI Vallée de l'Oise1 10 17.0 0.72
Berville 40 1 00 00.5 0.00
Bessancourt 35 1 30 118.4 7.810
Bezons 111 PPRI Seine Aval1 132 100.0 0.014
Boisemont 20 1 00 08.9 0.12
Boissy-l'Aillerie 50 1 00 03.0 0.34
Bonneuil-en-France 40 1 110 01.2 0.014
Bouffémont 81 1 00 08.8 0.44
Bouqueval 20 1 20 00.1 0.00
Bray-et-Lû 31 PPRI Epte1 10 02.0 0.02
Brignancourt 30 1 00 00.7 0.04
Bruyères-sur-Oise 50 PPRI Vallée de l'Oise1 90 115.3 4.22
Bréançon 10 1 00 01.2 0.00
Buhy 10 1 00 00.8 0.00
Butry-sur-Oise 60 PPRI Vallée de l'Oise1 00 01.5 0.72
Béthemont-la-Forêt 30 1 00 01.1 2.22
Cergy 811 PPRI Vallée de l'Oise1 60 017.9 26.342
Champagne-sur-Oise 80 PPRI Vallée de l'Oise1 10 018.2 4.47
Charmont 20 PPRI Aubette de Magny et ruissellement1 00 00.0 0.00
Chars 30 1 20 01.6 0.02
Chaumontel 70 1 10 02.5 0.18
Chaussy 20 1 00 00.0 0.02
Chauvry 20 1 00 00.5 0.00
Chennevières-lès-Louvres 20 1 32 00.1 0.00
Châtenay-en-France 10 1 00 00.1 0.00
Chérence 21 1 00 00.1 0.02
Cléry-en-Vexin 10 1 00 02.5 0.10
Commeny 10 1 10 01.8 0.00
Condécourt 10 1 00 00.4 0.20
Cormeilles-en-Parisis 84 PPRI Seine Centre1 40 151.4 4.341
Cormeilles-en-Vexin 42 1 00 23.0 1.22
Courcelles-sur-Viosne 30 1 00 00.3 0.10
Courdimanche 411 1 00 010.6 0.08
Deuil-la-Barre 144 1 00 14.6 0.88
Domont 82 1 00 09.4 1.823
Eaubonne 137 1 00 11.0 0.021
Enghien-les-Bains 144 1 00 20.1 0.020
Ennery 11 1 00 16.1 0.514
Ermont 116 1 20 00.1 0.026
Fontenay-en-Parisis 30 1 20 01.7 0.44
Fosses 60 1 20 00.1 0.06
Franconville 96 1 20 32.0 0.689
Frouville 10 1 00 01.3 0.20
Frémainville 30 1 00 00.4 0.10
Frémécourt 12 1 00 00.8 0.10
Frépillon 36 1 00 035.2 1.22
Garges-lès-Gonesse 124 1 20 15.0 0.431
Genainville 30 1 20 01.6 0.02
Gonesse 70 1 190 428.6 2.575
Goussainville 70 1 120 22.6 0.339
Grisy-les-Plâtres 20 1 00 01.1 0.02
Groslay 63 1 30 37.6 0.726
Guiry-en-Vexin 10 1 00 00.5 0.00
Génicourt 36 1 20 00.3 2.10
Haravilliers 42 1 00 02.5 0.80
Haute-Isle 40 PPRI Seine Amont1 00 00.2 0.00
Herblay-sur-Seine 87 PPRI Seine Centre1 110 234.8 2.437
Hodent 20 1 00 00.6 0.90
Hédouville 10 1 00 01.0 0.00
Hérouville-en-Vexin 31 1 00 02.3 1.90
Jagny-sous-Bois 20 1 00 01.2 0.10
Jouy-le-Moutier 102 PPRI Vallée de l'Oise1 00 025.9 2.610
L'Isle-Adam 81 PPRI Vallée de l'Oise1 00 119.0 1.259
La Chapelle-en-Vexin 10 1 00 00.5 0.40
La Frette-sur-Seine 53 PPRI Seine Centre1 00 00.4 0.36
La Roche-Guyon 60 PPRI Seine Amont1 00 00.0 0.02
Labbeville 30 1 00 02.0 0.00
Lassy 30 1 00 00.2 0.00
Le Bellay-en-Vexin 10 1 00 00.3 0.00
Le Heaulme 11 1 00 00.0 0.00
Le Mesnil-Aubry 50 1 00 10.6 0.00
Le Perchay 20 1 00 00.1 0.02
Le Plessis-Bouchard 96 1 20 01.6 0.46
Le Plessis-Gassot 20 1 30 05.2 0.02
Le Plessis-Luzarches 30 1 00 00.1 0.30
Le Thillay 50 1 10 226.8 3.98
Livilliers 10 1 00 04.9 0.10
Longuesse 20 1 00 01.2 1.60
Louvres 80 1 31 270.2 5.98
Luzarches 61 1 00 013.9 2.64
Maffliers 40 1 00 04.2 0.010
Magny-en-Vexin 20 PPRI Aubette de Magny et ruissellement1 00 110.3 0.017
Mareil-en-France 51 1 00 01.9 0.00
Margency 86 1 00 00.3 0.02
Marines 24 1 30 06.7 1.68
Marly-la-Ville 71 1 190 235.2 0.24
Maudétour-en-Vexin 11 1 00 00.1 0.00
Menouville 10 1 00 00.0 0.00
Menucourt 48 1 00 08.6 0.010
Moisselles 51 1 30 00.5 1.26
Montgeroult 50 1 00 00.2 0.00
Montigny-lès-Cormeilles 712 1 00 22.4 0.212
Montlignon 137 1 00 20.7 0.30
Montmagny 75 1 10 12.9 1.912
Montmorency 109 1 10 20.9 0.812
Montreuil-sur-Epte 20 PPRI Epte1 00 01.1 0.00
Montsoult 50 1 00 26.5 0.14
Mours 62 PPRI Vallée de l'Oise1 00 023.3 0.712
Moussy 10 1 00 00.0 0.00
Mériel 90 PPRI Vallée de l'Oise1 20 06.3 1.94
Méry-sur-Oise 100 PPRI Vallée de l'Oise1 30 08.7 6.16
Nerville-la-Forêt 10 1 00 01.8 1.20
Nesles-la-Vallée 30 1 10 04.2 0.94
Neuilly-en-Vexin 10 1 00 00.5 0.00
Neuville-sur-Oise 60 PPRI Vallée de l'Oise1 10 024.2 18.43
Nointel 11 1 00 00.2 1.41
Noisy-sur-Oise 40 PPRI Vallée de l'Oise1 00 01.1 0.30
Nucourt 20 PPRI Aubette de Magny et ruissellement1 10 10.3 0.12
Omerville 10 1 00 01.5 0.10
Osny 51 1 50 320.2 6.428
Parmain 60 PPRI Sausseron, PPRI Vallée de l'Oise1 00 03.6 2.36
Persan 70 PPRI Vallée de l'Oise1 90 359.7 6.818
Pierrelaye 60 1 92 116.1 1.726
Piscop 50 1 00 00.2 0.611
Pontoise 70 PPRI Vallée de l'Oise1 40 30.7 0.650
Presles 81 PPRI Presles1 00 02.9 0.58
Puiseux-Pontoise 20 1 10 07.9 21.98
Puiseux-en-France 30 1 10 06.9 21.22
Roissy-en-France 30 1 130 120.2 6.5176
Ronquerolles 20 1 00 01.4 0.30
Sagy 44 1 00 00.9 0.22
Saint-Brice-sous-Forêt 54 1 22 18.4 0.638
Saint-Clair-sur-Epte 31 PPRI Epte1 22 02.3 0.12
Saint-Cyr-en-Arthies 20 1 00 00.1 0.10
Saint-Gervais 20 1 00 00.2 0.10
Saint-Gratien 103 1 00 10.5 0.015
Saint-Leu-la-Forêt 77 1 30 13.6 1.116
Saint-Martin-du-Tertre 81 1 30 00.7 0.14
Saint-Ouen-l'Aumône 80 PPRI Vallée de l'Oise1 549 856.2 0.567
Saint-Prix 135 1 00 15.9 0.810
Saint-Witz 64 1 90 018.0 20.481
Sannois 73 1 30 21.6 0.145
Santeuil 10 1 00 00.5 0.00
Sarcelles 145 1 70 17.1 0.528
Seraincourt 51 1 20 01.2 0.32
Seugy 30 1 00 05.5 1.12
Soisy-sous-Montmorency 133 1 20 41.6 0.412
Survilliers 40 1 31 00.4 13.68
Taverny 85 1 20 316.4 5.579
Theuville 40 1 00 00.0 0.10
Théméricourt 20 1 10 00.0 0.02
Us 30 1 00 10.3 0.02
Vallangoujard 70 1 00 00.6 4.10
Valmondois 140 PPRI Sausseron, PPRI Vallée de l'Oise1 00 00.6 0.12
Vaudherland 10 1 00 00.2 0.02
Vauréal 87 PPRI Vallée de l'Oise1 00 07.9 0.222
Viarmes 90 1 00 018.5 1.56
Vienne-en-Arthies 10 1 00 00.3 0.00
Vigny 30 1 00 10.9 0.55
Villaines-sous-Bois 50 1 00 02.6 1.72
Villeron 20 1 20 015.6 2.20
Villers-en-Arthies 20 1 00 01.1 0.00
Villiers-Adam 24 1 00 01.2 2.90
Villiers-le-Bel 81 1 20 211.8 4.16
Villiers-le-Sec 40 1 00 00.1 0.00
Vémars 70 1 30 013.8 4.53
Vétheuil 40 PPRI Seine Amont1 00 00.8 0.22
Wy-dit-Joli-Village 10 1 00 00.1 0.40
Écouen 65 1 00 01.4 0.97
Épiais-Rhus 32 1 00 01.6 0.70
Épiais-lès-Louvres 20 1 00 07.7 0.02
Épinay-Champlâtreux 30 1 00 00.0 0.00
Éragny-sur-Oise 50 PPRI Vallée de l'Oise1 50 112.4 2.240
Ézanville 54 1 00 00.6 0.04

Air, waste, energy: where to find more

These topics are not published here town by town; the official sources:

Sources

  1. Géorisques (MTE, BRGM), API Géorisques v1 : risques recensés (GASPAR), arrêtés de catastrophe naturelle, plans de prévention des risques naturels, potentiel radon, par commune (2026-10-03 ; Licence Ouverte 2.0)
  2. Géorisques (MTE), API Géorisques v1 : installations classées pour la protection de l'environnement, département 95 (2026-10-03 ; Licence Ouverte 2.0)
  3. Géorisques (MTE, BRGM), API Géorisques v1 : secteurs d'information sur les sols (SIS), département 95 (2026-10-03 ; Licence Ouverte 2.0)
  4. Géorisques (BRGM), API Géorisques v1 : carte des anciens sites industriels et activités de service (CASIAS), département 95 (2026-10-03 ; Licence Ouverte 2.0)
  5. Hub'eau (OFB, BNPE), API Hub'eau Prélèvements en eau : volumes annuels prélevés par ouvrage, département 95 (2024 ; Licence Ouverte 2.0)
  6. Office français de la biodiversité (SISPEA), Données de synthèse SISPEA 2024, services publics d'eau potable (2024 ; Licence Ouverte 2.0)
  7. Office français de la biodiversité (SISPEA), Données de synthèse SISPEA 2024, services publics d'assainissement collectif (2024 ; Licence Ouverte 2.0)
  8. Cerema, Consommation d'espaces naturels, agricoles et forestiers par commune, du 1er janvier 2011 au 1er janvier 2025 (2011-2025 ; Licence Ouverte 2.0)
  9. data.gouv.fr (Etalab), Base nationale consolidée des infrastructures de recharge pour véhicules électriques (schéma IRVE statique 2.3.1), lignes du 95 (2026-10-03 ; Licence Ouverte 2.0)

Data retrieved on Oct. 3, 2026.